COWS are happier and less anxious if they are with pals, a study has found.

When put on their own or with unfamiliar cattle there was a rise in their heart rate and cortisol – the chemical animals ­produce when they feel stress.

PhD researcher Krista McLennan, 27, of Northampton University, said: “If farmers keep an eye out for the cows which like to keep their friends with them it could benefit their welfare and might ­improve milk yields.”